Dusting device



R. R. ROOT DUSTING DEVICE Filed Feb. 24, 1944 June 15, 194s.

T mw m@ WM me .m H r M .w uw A Patented June 15, 1948 DUSTING DEVICERalph R. Root, Lakewood, Ohio, assignor, by mesne assignments, to NacoManufacturing Company, Huntington Park, Calif., a corporation ofCalifornia Application February 24, 1944, serial No. 523,651 (o1.43-14'n 4 Claims.

1 v This invention relates to devices for distributing insecticide andfungicide materials and aims toprovide an improved `device of this kindwhich is of a simple economical construction but which is eflicient andreliable and can be manually carried and operated.

' Another object of this invention is to provide an improved manuallyportable cluster having a rigid handle member and a dust containerdepending therefrom and wherein the air for distributing the dust iseiectively supplied through said handle member.

A further object of the invention is to provide an improved duster inwhich the rigid handle member has air inlet and delivery passages landwherein one portion of the air supply follows a circuitous path throughthe dust container and another portion is supplied directly to saiddelivery passage.

Still another object is to provide an improved duster of this kind inwhich the air supply means includes a, cylinder barrel surrounding aportion of the rigid handle member and cooperating therewith to form anair pump.

The invention can be further briefly summarized as consisting in certainnovel combinations and arrangements of parts hereinafter described andparticularly set out in the appended claims.

In the accompanying sheet of drawings,

Fig. lfis a longitudinal sectional view taken through an insecticidedistributing device constructed according to the present invention;

Fig. 2 is a transverse sectional view thereof taken on line 2--2 0f Fig.l;

Fig. 3 is a transverse vsectional view taken through the handle memberon line 3-3 of Fig. 1; and

Figs. 4 and 5 are transverse sectional views taken'through the air pumpon lines 4--4 and 5-5, respectively, of Fig. 1.

In the embodiment of the invention illustrated in the drawings I show`an insecticide distributing device I!! comprising an elongated body rhandle member II, and a container I2 connected with and depending fromsaid body and adapted to contain a supply of insecticide and/orfungicide material I3, preferably in the form of dust.

The elongated body or handle member III is a rigid member made of wood,plastic or other suitable inexpensve material, and has coaxiallongitudinal air passages lll and I therein which are connected by arelatively restricted passage I6. The passage I4 is an air inlet passageto which air under pressure is supplied for causing the .in-

2 secticide material I3 to be mixed with air and delivered in thedesired manner. The passage I5-is a delvery'passage through which themixture of air and insecticide material is discharged from the device.

The body I-I is provided at its outer or forward end with a nozzlemember or fitting VI having straight and angular openings I8 and i9 fordirecting the air and insecticide mixture in a stream in the desireddirection. The opening I8 extends axial-ly4 of the body II and serves tudirect the mixture in a substantially straight or forward direction. Theopening I9 is used for directing the mixture in an upward direction andis convenient vfor applying such mixture to the undersurfaces of plantfoliage. When it is desired to deliver the stream through the openingI9, the opening I8 is closed as by the operator placing a ringer overthe end of this opening.- When both of the openings I8 and I9 are leftuncovered, the mixture is discharged only through the opening I8.

The container I2 is here shown in the form of a cylindrical can or tankextending in depending relation from the body II and having its upu perend wall |2a connected with the latter as by means of the screws 20. Thebody of the container is preferably-cylindrical and is permanentlyconnected with its end Wall I2a as by means-of the solder i211. Thelower end of the container has a removable cover 2.4 formed of plasticor other suitable material and adapted to be removably connected withthe container by means of a pivoted bail or strap 22 and a locking nut23 which is carried by the cover and cooperates with the bail when thelatter is in its coverretaining position. The cover- 2l is preferablyconstructed with a curved integral extension Zla which serves as a scoopfor use in nlling the Acontainer l2 with the insecticide material I3.The coverv 2l also has a pair of substantially diametrically opposedrecesses 24 and 25 formed therein and a transverse passage 2.9connecting such reeesses. The purpose of these recesses and passage willbe presently explained.

A@is mentioned above air under pressure is supplied to the inlet passaget4 for operating the device. A portion of this air is passed through thecontainer I2 along a circuitous path for mixing with the insecticidematerial I3. and the air and insecticide mixture is then dischargedthrough the delivery passage I5 and the ynozzle l1. Another portion ofthe air is discharged directly from the inlet passage I4 through therelao tively restricted passage I6 into the delivery passage I5. Thisportion of the air provides a direct blast through the delivery passageand nozzle which serves to produce a more complete atomization ordistribution of the dust particles in the air stream. This blast alsocauses the mixture to be delivered from the nozzle I1 in a high velocitystream which will travel and carry the dust particles fora substantialdistance inthe direction in which it is desired to be projected. Theby-passing of a portion of the air supply through the passage I6 alsoacts as a regulating means which prevents an excessive amount of thematerial I3 from being discharged from the conl tainer I2 as would occurif all of the air were passed through the container.

For obtaining the above-mentioned circuitous ow of air through thecontainer I2, I provide a pair of tubes 28 and 29 which project from thebody I and extend downwardly into the container I2 to a point adjacentthe lower end thereof. The tube 28 forms an extensionof the air inletpassage I4 and the tube 29 forms an extension of the delivery passageI5. These tubes are preferably attached to the side wall of thecontainer I2, as by means of the solder 39, and are located atsubstantially diametrically opposed points so that their lower ends willextend, respectively, into the recesses 24 and 25 of the Icover 2I whenth'e latter is applied to the container.

Adjacent their lower ends the tubes 28 and 29 have lateral openings 3|disposed substantially opposite the ends of the transverse passage 26 ofthe cover 2|. The tubes 28 and 29 are somewhat smaller in size than therecesses 24 and 25 so that spaces 32 and 33 are left between the tubesand cover through which the material I3 can pass downwardly to thelateral openings 3|. Th'e length of the tubes 28 and 29 is preferablysuch that their lower ends are separated from the cover 2| byintervening spaces 34 with which the passages of the tubes communicate.

The portion of the air supply which flows downwardly through the tube 28is discharged laterally from the opening 3| and through the passage 26of the cover 2| into the tube 29 through the opening 3| of the latter.As the air passes from the tube 28 into the passage 26 and from thispassage into the tube 29, it picks up dust from the spaces 32 and 33 andsuch dust becomes entrained and diffused in the air stream. The air anddust mixture flows upwardly through th'e tube 29 to the delivery passageI5 from which it is discharged in the manner above explained. It shouldalso be explained at this point that the velocity discharge of airthrough the passage I6 into the delivery passage I5 flows across theupper end of the tube 29 and tends to draw or facilitate th'e now of themixture upwardly in the latter.

The supply of material I3 in the container I2 can be maintained in aloose and free-owing condition by providing one or more openings 35 inthe cover 2| which discharge air from the passage 26 upwardly throughsuch material. The spaces 34 at the ends of the tubes 28 and' 29 alsopermit the discharge of some air from the tubes at these points whichassists in keeping th'e m-aterial adjacent the tubes in a loose andfree-flowing condition.

The air which is supplied under pressure to the inlet passage I4 is, inthis instance, obtained from a manually operated pump comprising asubstantially cylindrical portion or extension IIa of the handle vmemberor body II and a cylinder barrel 31 surrounding such extension, Theextension IIa forms a piston or plunger with which the cylinder barrel31 Icooperates to denne a pump chamber 38. A iiexible cup-shaped packing39 carried by the outer end of the extension IIa cooperates with theinner surface of the barrel 31, so that during relative reciprocationbetween such barrel and the extensionair will be compressed in the pumpchamber 38 and forced into the inlet passage I4.

A check valve in the form of a disk 40 controls the inlet passage I4 andis opened by movement in adirection toward the container I2 and awayfrom a valve seat 4I formed by the transverse wall of a cup-member 42.The latter member is mounted on a relatively reduced portion 43 of theextension IIa and is retained thereon by the transverse pin 44. This pinalso retains the valve -disk 40 in adjacent relation to the valve seat4| and limits the extent of movement of the valve away from its seat.

Removal of the cylinder barrel 31 from the extension I Ia is preventedduring the normal operation of the device by a lug 45 mounted on theinner end of the cylinder barrel and operable in a longitudinal groove46 formed in the extension. The ends of the groove form stops adapted tobe eng-aged by the lug for limiting the travel of the cylinder barrel.

From the foregoing description and the accompanying drawing it will nowbe readily understood that I have provided an improved form ofinsecticide distributing device which can be very economicallymanufactured. It will also be seen that the improved device is manuallyportable, easy to operate, and is very eITective and reliable fordistributing insecticide and fungicide materials for application tovegetation or for various other purposes.

While I have illustrated and described my improved device inconsiderable detail, it will be understood, of course, that I do notwish to be correspondingly limited but regard my invention as includingall changes and modifications coming within the scope of the appendedclaims.

Having thus described my invention, I claim:

1. In a duster, a body having inlet and delivery passages, means forsupplying air under pressure to said inlet passage, a container attachedto said body and adapted to contain a supply of dust, a bottom'wall forclosing the lower end of said container, a pair of tubes connected withsaid inlet and delivery passages and extending into the container withtheir lower ends adjacent the bottom walls of said container, and meanson said bottom wall providing an air and dust mixing passage connectingthe lower ends of said tubes. l` 4-2.' In aduster, a body having inletand delivery passages, means for supplying air under pressure to saidinlet passage, a container attached to said body and adapted to containa supply of dust, a pair of tubes connected with said inlet and deliverypassages and extending into the container with their lower ends adjacentthe bottom of said container, said tubes having substantially opposedlateral4 openings 'adjacen their lower ends, and a closure for the lowerend of the container having a portion extending upwardy between thetubes and provided with a passage connecting said lateral openings, saidtubes and closure having space theretween to permit dust to enter `thelast mentioned passage.

3. A manually portable and operable cluster comprising an elongatedsubstantially straight rigid vbody which includes a handle portionadapted to be grasped for manually manipulating the device and a plungerportion, a container attached to and depending from said body andadapted to contain a supply of dust, said body being solid except for anopening extending axially therethrough and Which includes an inletpassage for air under pressure and a discharge passage for a dust andair mixture, conduit means connecting said container with said dischargepassage for supplying the dust and air mixture to the latter from saidcontainer, conduit means connected with said inlet passage andcommunieating with said container adjacent the bottom thereof forsupplying air under pressure thereto, a pump cylinder surrounding saidplunger portion and reciprocable thereon, said cylinder and plungerportion dening a pump pressure chamber connected with said inletpassage, and a check valve in said inlet passage and being operable toopen in a direction toward said container.

20 4. A manually portable and operable duster comprising an elongatedsubstantially straight rigid body which includes a handle portionadapted to be grasped for manually manipulating the device and a plungerportion, a container attached to and depending from said body andadapted to contain a supply of dust, said body being solid except for anopening extending' axially therethrough and which includes an inletpassage for air under pressure, a discharge passage for a dust and airmixture and a permanently open relatively restricted passage connectingsaid inlet and discharge passages, conduit means connecting saidcontainer with said discharge passage for supplying the dust and airmixture to the latter from said container, conduit means connected Withsaid inlet passage and communicating with said container adjacent thebottom thereof for supplying air under pressure thereto, said restrictedpassage being located between the two conduit means leading into and outof said container, a pump cylinder surrounding said plunger portion andreciprocable thereon, said cylinder and plunger portion defining a pumppressure chamber connected with said inlet passage, and a check valve insaid inlet passage and being operable to open in a direction toward saidcontainer.

RALPH R. ROOT.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 1,207,794 Reddy Dec. 12, 19161,536,352 Murray May 5, 1925 1,712,804 Wytcherley May 14, 1929 1,769,904Bageley July 1, 1930 1,837,136 Roberts Dec. 15, 1931 2,068,871 Rose Jan.26, 1937 2,086,696 Brandt July 13, 1937 2,208,853 Oys July 23, 19402,219,208 Knight Oct. 12, 1940 2,226,013 Oys Dec. 24, 1940 FOREIGNPATENTS Number Country Date 835,761 France Oct. 3, 1938

